Answer:
Step-by-step explanation:
[tex]16^{x}=\frac{1}{64}\\\\(4^{2})^{x}=64^{-1}\\\\(4^{2})^{x}=(4^{3})^{-1}\\\\4^{2x}=4^{-3}\\\\[/tex]
Compare the powers now
2x = -3
x = -3/2